Volumetric flask device

Abstract

The utility model discloses a volumetric flask device. The device comprises a main cavity, an auxiliary cavity, a connecting device, scale marks, a bottle neck and a plug, the upper part of the main cavity is provided with an external thread and a first sealing surface; the auxiliary cavity is located on the upper portion of the main cavity, internally provided with a second sealing face matched with the main cavity and fixed to the main cavity through a connecting device. And the bottleneck is positioned at the upper part of the auxiliary cavity and is integrally communicated with the auxiliary cavity. When the volumetric flask device is used for preparing a solution, the solution does not need to be firstly dissolved and then transferred, and the concentration of the obtained solution is more accurate.

Description

Technical Field

[0001] This utility model belongs to the field of quantitative container technology, specifically a volumetric flask device. Background Technology

[0002] A volumetric flask is an instrument used to prepare solutions of a specific concentration. It is generally a long, narrow-necked, pear-shaped, flat-bottomed glass bottle with a ground glass stopper, and graduations on the neck. Some volumetric flasks are made of plastic. The volume at the mark when the volume inside the flask reaches that mark at a specified temperature is the indicated volume. In standard preparation procedures for solid solutes, because the volumetric flask has a long, narrow neck and cannot be heated, a certain mass of solute is usually weighed using a balance and placed in a beaker. After dissolving in a solvent, the solute is transferred to the volumetric flask. Heating or ultrasonic agitation may be necessary during the dissolution process to aid dissolution. When the solute is a sparingly soluble or highly viscous substance (such as a polymer), or when preparing a solution close to saturation, the dissolution and transfer process becomes extremely difficult, even impossible to complete, significantly reducing the accuracy of the solution concentration. Summary of the Invention

[0003] To address the problems existing in the background art, this utility model provides a volumetric flask device with a simple structure. It can eliminate the transfer process when preparing solutions of substances that are difficult to dissolve or transfer, thereby improving the accuracy of solution concentration.

[0004] The present invention adopts the following technical solution.

[0005] This utility model provides a volumetric flask device, which includes a main cavity, a secondary cavity, and a connecting device; the upper end of the main cavity is open, the secondary cavity is located above the main cavity and forms a communication structure with the main cavity, the top of the secondary cavity extends upward to form a bottleneck, and the secondary cavity is fixed to the main cavity through the connecting device and forms a detachable connection.

[0006] In this invention, the upper part of the main cavity is provided with an external thread, and the connecting device includes two fixing seats symmetrically distributed on the lower outer side of the secondary cavity. The fixing seats are provided with internal threads, and the internal threads and external threads are matched to achieve the fixation between the secondary cavity and the main cavity.

[0007] In this invention, a positioning protrusion is provided at the lower part of the external thread, and a positioning groove is provided at the lower part of the outer side of the internal thread. The positioning protrusion and the positioning groove are matched to limit the degree of thread engagement.

[0008] In this invention, the upper part of the main cavity is recessed to form a first sealing surface, and the secondary cavity is provided with a second sealing surface adapted to the main cavity. When the secondary cavity and the main cavity are connected, the first sealing surface and the second sealing surface are tightly fitted to form a conical sealing structure.

[0009] In this invention, the first sealing surface and the second sealing surface have a frosted structure.

[0010] In this invention, the main cavity is a flat-bottomed columnar hollow cavity structure, and the secondary cavity is a funnel-shaped structure.

[0011] In this utility model, the bottleneck is marked with scale lines.

[0012] In this invention, a plug is provided at the upper end of the bottleneck, and a matching seal is formed between the plug and the bottleneck.

[0013] When preparing a solution using the volumetric flask device of this utility model, the specific steps include: weighing a certain amount of substance and placing it in the main chamber, adding sufficient solvent, and if necessary, heating or ultrasonically vibrating the main chamber until dissolved. After cooling, cover the secondary chamber to ensure a tight seal. Screw the internal and external threads of the connecting device until the positioning groove and positioning protrusion engage. Add solvent from the top of the neck of the bottle to the graduation mark, and shake well to complete the preparation.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] Its simple structure and ingenious design make it ideal for preparing solutions, especially those containing substances that are difficult to dissolve or transfer. This eliminates the need for transfer, avoiding loss of weighed substances and ensuring accurate solution concentration. Furthermore, when the volumetric flask contains a small amount of solution, the connection can be opened to directly draw solution from the main chamber, which is particularly convenient when using a pipette. The detachable structure also simplifies the cleaning of the volumetric flask. Attached Figure Description

[0016] Figure 1 This is a front view of the overall structure of the volumetric bottle device of this utility model.

[0017] Figure 2 This is a structural diagram of the main cavity of the volumetric flask device of this utility model.

[0018] Figure 3 This is a structural diagram of the secondary cavity and connecting device of the volumetric flask device of this utility model.

[0019] Figure 4 This is a cross-sectional view of the sealing structure of the main cavity and the secondary cavity of the volumetric flask device of this utility model.

[0020] The following labels are used in the diagram: 1: Main cavity; 1a: First sealing surface; 1b: External thread; 1c: Positioning protrusion; 2: Secondary cavity; 2a: Second sealing surface; 3: Connecting device; 3a1~3a2: Fixing seat; 3b: Internal thread; 3c: Positioning groove; 4: Scale line; 5: Bottle neck; 6: Plug. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1 to 4 A volumetric flask device includes a main cavity 1, a first sealing surface 1a, an external thread 1b, a positioning protrusion 1c, a secondary cavity 2, a second sealing surface 2a, a connecting device 3, a fixing seat 3a1~3a2, an internal thread 3b, a positioning groove 3c, a graduation line 4, a neck 5, and a stopper 6.

[0023] The main cavity 1 is a flat-bottomed cylindrical cavity structure. The upper part is slightly concave to form a sloping first sealing surface 1a. The upper end of the outer cylindrical structure has an external thread 1b, and there is a positioning protrusion 1c below the external thread 1b.

[0024] The secondary cavity 2 has a funnel-shaped structure, and a second sealing surface 2a adapted to the main cavity 1 is provided inside the secondary cavity 2. When the secondary cavity 2 is fixed on the main cavity 1, the first sealing surface 1a and the second sealing surface 2a are tightly fitted to form a conical sealing structure. Preferably, both the first sealing surface 1a and the second sealing surface 2a have a frosted structure.

[0025] The connecting device 3 includes fixed seats 3a1~3a2, internal thread 3b, and positioning groove 3c. Fixed seats 3a1~3a2 are symmetrically distributed on the lower part of the outer side of the secondary cavity 2 and are tightly connected to the secondary cavity 2. The internal thread 3b can rotate freely and move up and down around the fixed seats 3a1~3a2 but cannot fall off. The internal thread 3b matches the external thread 1b. The positioning groove 3c matches the positioning protrusion 1c.

[0026] The scale line 4 is located in the lower middle part of the bottleneck 5, and the stopper 6 is located at the upper end of the bottleneck 5 and matches and seals it.

[0027] The working principle of this utility model is as follows:

[0028] When preparing a solution using this invention, weigh a certain amount of substance and place it in the main chamber 1. Add sufficient solvent. If necessary, heat or ultrasonically vibrate the main chamber 1 until dissolved. After cooling, cover the secondary chamber 2 so that the first sealing surface 1a and the second sealing surface 2a fit tightly together. Screw the internal thread 3b and the external thread 1b of the connecting device 3 until the positioning groove 3c and the positioning protrusion 1c engage. At this time, the sealing surface is accurately sealed and the volume of the volumetric flask is fixed. Add solvent from the top of the neck 5 to the graduation line 4, put on the stopper 6, and shake well to complete the solution preparation.

[0029] This utility model is not limited to the details of the above embodiments. All embodiments are exemplary and not restrictive. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to encompass all variations falling within the meaning and scope of equivalents of the claims. No reference numerals in the claims should be construed as limiting the scope of the claims. All modifications, variations, substitutions, etc., within the principles and spirit of this utility model are within the protection scope of this utility model.

Claims

1. A volumetric flask apparatus, characterized by, It includes a main cavity, a secondary cavity, and a connecting device; the main cavity is open at the upper end, the secondary cavity is located above the main cavity and forms a communication structure with the main cavity, the top of the secondary cavity extends upward to form a bottleneck, and the secondary cavity is fixed to the main cavity through the connecting device to form a detachable connection.

2. The volumetric flask apparatus of claim 1, wherein, The upper part of the main cavity is provided with external threads, and the connecting device includes two fixing seats symmetrically distributed on the lower outer side of the secondary cavity. The fixing seats are provided with internal threads, and the internal threads and external threads are matched to achieve the fixation between the secondary cavity and the main cavity.

3. The volumetric flask apparatus of claim 2, wherein, The lower part of the external thread has a positioning protrusion, and the lower part of the internal thread has a positioning groove. The positioning protrusion and the positioning groove are matched to limit the degree of thread engagement.

4. The volumetric flask apparatus of claim 2, wherein, The upper part of the main cavity is recessed to form a first sealing surface, and the secondary cavity is provided with a second sealing surface that is adapted to the main cavity. When the secondary cavity and the main cavity are connected, the first sealing surface and the second sealing surface fit tightly together to form a conical sealing structure.

5. The volumetric flask apparatus of claim 4, wherein, The first and second sealing surfaces have a frosted structure.

6. The volumetric flask apparatus of claim 1, wherein, The main cavity is a flat-bottomed cylindrical hollow structure, and the secondary cavity is a funnel-shaped structure.

7. The volumetric flask apparatus of claim 1, wherein, The bottleneck is marked with graduation lines.

8. The volumetric flask apparatus of claim 1, wherein, A stopper is installed at the upper end of the bottleneck, and a matching seal is formed between the stopper and the bottleneck.

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